Method writeFields

console.go:186–287

writeFields appends formatted key-value pairs to buf.

(evt map[string]interface{}, buf *bytes.Buffer)

// writeFields appends formatted key-value pairs to buf.
func (w ConsoleWriter) writeFields(evt map[string]interface{}, buf *bytes.Buffer) {
	var fields = make([]string, 0, len(evt))
	for field := range evt {
		var isExcluded bool
		for _, excluded := range w.FieldsExclude {
			if field == excluded {
				isExcluded = true
				break
			}
		}
		if isExcluded {
			continue
		}

		switch field {
		case LevelFieldName, TimestampFieldName, MessageFieldName, CallerFieldName:
			continue
		}
		fields = append(fields, field)
	}

	if len(w.FieldsOrder) > 0 {
		w.orderFields(fields)
	} else {
		sort.Strings(fields)
	}

	// Write space only if something has already been written to the buffer, and if there are fields.
	if buf.Len() > 0 && len(fields) > 0 {
		buf.WriteByte(' ')
	}

	// Move the "error" field to the front
	ei := sort.Search(len(fields), func(i int) bool { return fields[i] >= ErrorFieldName })
	if ei < len(fields) && fields[ei] == ErrorFieldName {
		fields[ei] = ""
		fields = append([]string{ErrorFieldName}, fields...)
		var xfields = make([]string, 0, len(fields))
		for _, field := range fields {
			if field == "" { // Skip empty fields
				continue
			}
			xfields = append(xfields, field)
		}
		fields = xfields
	}

	for i, field := range fields {
		var fn Formatter
		var fv Formatter

		if field == ErrorFieldName {
			if w.FormatErrFieldName == nil {
				fn = consoleDefaultFormatErrFieldName(w.NoColor)
			} else {
				fn = w.FormatErrFieldName
			}